HaBO: Olfactory Scientist

This HaBO is from Elizabeth, who wants to find this romance:
I need help finding this old Harlequin romance from the late 90s:
The main female character’s name was Nikki and she was an olfactory scientist performing research on how the brain reacted to various scents, similar to how pigs find truffles in the woods. She was specifically trying to research if voles, or hamsters, could make bonds through scents. She sets up an experiment where she inadvertently meets our male main character who is interested in her research, but for his own business interests, which are to use scents in cologne that will help men appear more attractive to women. Because the MMC was blindfolded during their first meeting he doesn’t know what Nikki looks like but Nikki cannot deny her attraction, or chemistry, with the MMC, and arranges a night-time rendezvous with the MMC. These late-night rendezvous continue after the MMC hires Nikki to work on his perfume. The MMC eventually figures out that Nikki is his late-night lover and attempts to woo her despite drama and rivalry at the office.
I love this story and have re-read it multiple times throughout the years, but have lost my latest copy. Please help me find this book!
I feel like there is going to be a handful of people who want to pick this one up!